Pumps



Dec. 10, 1957 N. Mus'nLLo ETAL 2,815,719

PUMPS Filed Jan. 8, 1954 I 5 Sheets-Sheet l /4 r.lo

BYQMM/ i mi Dec. 10, 1957 N MUsTlLLo ErALl PUMPS 3 Sheets-Sheet 2 Filed Jan. 8. 1954 BY MILL-6% lDec. 10, 1957 i N. MUsTlLLo ETAL 2,815,719

PUMPS -Filed Jan. 8, 1954 5 Sheets-Sheet 3 Num-4o mofrrlLLo ARC ANGELA 0mm-:5E DE DIGIACOMO PUMPS Nunzio Mnstillo and Arcangela Cianese de Digiacomo, Buenos Aires, Argentina Application January 8, 1954, Serial No. 403,024

9 Claims. (Cl. 10S- 178) The present invention relates to a new suction pump which is especially adapted for drinking water wells.

Much has been done in connection with suction and impelling pumps, but as is known, these essentially comprise a cylinder in which a plunger is moved by means of adequate mechanism, said piston alternately dividing the cylinder into aspiration and impulsion chambers; in the aspiration run the plunger creates a vacuum such that the exterior atmospheric pressure is in condition -to raise a valve allowing liquid to pass to the space left by the plunger. At the same time, the liquid existing in the other part of the cylinder closes the piston impulsion valve and this expels the liquid externally.

On reaching the dead point, the piston commences to retrocede, causing an increase in pressure in the aspiration chamber so that it closes the suction valve and opens the impulsion valve until the piston reaches the other dead point, all the water previously suctioned passing to the expulsion chamber so that, on commencing a new cycle, the impulsion valve is closed; and this cycle continues indenitely.

The adjustment between the body of the pump and the respective plunger, generally composed of leather sheets, after a certain time of use, causes a certain amount of light to be seen between the contact surfaces, suicient to cause seepage; and use of burlap causes a reduction in the rendering of the equipment.

In addition, the pump being provided With switch valves, the reduction of the hydraulic rendering is further increased. In this regard, poor adjustment of the said valves prevents the proper working thereof, and the closing of the passage of liquid is far from being eflicient.

All these inconveniences have been overcome by the use of the invention to which the present application refers.

For this reason and in order that the system, based on the principle of two columns, renders really desirable results, it is necessary to provide a suction pump having a perfect adjustment between the cylinder and the respective plunger, as well as between all the displaceable means which must carry packings. When this is done, a practically perfect suction is obtained. The packings are constituted by elastic tubular jackets against which the rings which surround the plunger are strongly frictioned. This friction is facilitated by the auto-lubrication provided by the liquid being pumped.

Another object of the invention is to oier a new suction pump characterized by having a plunger composed of a cylinder with open extremes, alternatively closed by a disk secured to a stem, so that on aspiration the disk closes the lower open extreme of the cylinder, expelling the water in the upper portion of the pump. On the return stroke, the lower end of the cylinder is opened to permit the entrance of liquid thereto, and since the member which engages the upper end of the cylinder is slotted, the pump of the invention performs constant work upon two columns of liquid.

Another object ofthe invention is to provide a friction ECC pump with a valvular mechanical system, with its corresponding piston, adjusted in accordance with the technical directions previously mentioned, the stem of which is t;nsioned by a spring of suicie'nt capacity for closing ,he liquid inlet, in a smoothly and eicient manner, coactioned by a cam prepared for that purpose.

Still another object of the invention is to offer a new suction pump constituted by a plurality -of pump bodies, the respective plungers of which are actioned simultaneously by means of an appropriate mechanism, the positions of the various plungers, in their respective runs, correspond to different antagonistic positions, so that a continuous suction is obtained, bringing as a consequence the uninterrupted upward movement of the column of liquid suctioned commencing from the moment that the intakes of liquid, one for each pump body, are connected with a general intake.

Further objects and advantages of the present invention will become evident from the following description taken in conjunction with the accompanying drawings in which:

Fig. l is an elevation view of a section which shows a pump body constructed in accordance with the invention.

Fig. 2 is a partial view of one of the phases of the cam corresponding to the position of the pump of Fig. 1.

Figs. 3, 4 and 5 are sketches of the following consecutive phases of the complete cycle which corresponds to the positions of the pumps of Fig. 6, and finally Fig. 6 is an elevation view, in section, of a device for carrying out the invention provided with three pump bodies constructively and operatively related to each other and provided with various plungers and admission valves.

In the different figures the same reference numbers indicate like or corresponding parts, letters indicating the whole of the various elements.

Referring to Fig. 1, d is a pump in accordance with the invention having a cylindrical pump body a within which a plunger b reciprocates. The pump body a comprises a central portion 1 and upper and lower portions 2 and 3 of enlarged internal diameter. Elastic tubular jackets 4 and 5, preferably made of rubber, are positioned to cover the internal surfaces of the portions 2 and 3 respectively.

A cylindrical tube 6 is provided within pump body a, said tube being frictionally secured to the jacket 4 at the upper portion 8 of the tube 6 by means of rings 7. Similar rings secure the bottom of the tube 6 to the jacket 5.

The plunger b comprises a stem 10, at the lower end of which is secured a disk 11 which closes the lower open end 12 of the tube 6. Rings 15 are secured to the upper end of the stem 10, the rings 15 being in continuous contact with an elastic tubular packing 16 which covers the internal surface of a coaxial tube 17.

A member 18 closes the top of the pump cylinder a, the member 18 having an orifice 19 which serves as a guide for the stem 10.

When the stem 10 `is forced downwardly, it carries with it the spider 20, said spider 20 being secured to the stem 10 at 22 and carrying arms 23 which contact the upper edge 21 of the tube 6 so that the stem lll forces the tube 6 downwardly. It will be observed that the spider 20 is spaced from the disk 11 by a distance which is greater than the vlength of the tube 6. Thus, when the arms 23 of the spider 20 contact the edge 21, the disk 11 is spaced from the tube 6 opening the lower open end 12 which remains open as the tube 6 is forced down by the stem 10.

The lower end of pump body a is connected to a tube 24 through which liquid enters the pump. An admission Y valve c comprising a disk 25 is provided for opening and closing the tube 24. The ldisk 2S is formed at the end of lateral projection 26 which is ixedly secured to the lower end of plunger 27 which reciprocates within cylindrical housing 30 which. is positioned alongside the pump body a. The interior of the housing'30 is lined with a tubul-ar flexible packing 29 and the plunger 27 hasl rings 28 tixed thereto, said rings 28 sliding againstthe packing 29.

The plunger 27 is fixed to the lower end of a stem. 31, said stem being guided by the member 33 andthe aperture 33 in the top of the housnig 30.

A stop 35 is securedto the lower end of the stem 31 beneath the member 33 and a compression spring 34 is placed on the stem between the member 33 andthe stop 35 to urge the stem downwardly.

The upper end of` stem 31 is formed with a guideway 36 through which axle 37 projects. Axle 37 rotates in bearings 38 and 39, power bein-g supplied by av pinion 4l which meshes with, gear 40 which issecured to the, axle 37. A connecting rod 42 is secured at itsy upper end-y 43 by means of pin 44 to the side ofgear 40 in an off-center position so that rotation of gear 40 raises and lowers the rod 42` The lower en d of connecting rod 42 is formed with a yoke 45 which: is pivotally secured to the head 46 ofthe stern 10. Thus, rotation of gear 40 effects vertical reciprocation of the plunger b.

A cam member 47 is secured to the axle 37 adjacent the guideway 36 at the upper end of stem 31. A pin. 50 is secured to the stem 31 above the guideway 36 and a roller 49 ismounted on the pin 50 for free rotation. The cam 47 underlies the* roller! 49 with the periphery 48 of the cam 47 in close Contact with the roller. Thus, rotation of the axle 37 revolves the cam 47 which raises the roller 49 to thereby overcome the pressure of spring 34 and lift the plunger 27 and hence the disk 25 ofadmission valve c. Since cam 47 functions only to lift the roller 49, it is not necessary for the periphery 48 of. the cam 47 to maintain contact with the roller 49 throughout the revolution of the cam. As can be seen in Figs. 2, 3, 4 and 5, the cam 47 only contacts roller 49 over the portion of its periphery covered by the points 53, 54, 55 and 56.

Fig. 6 shows the invention using three ofthe pumps d each of which are identical. to the pump d shown in Fig, 1, the variousv inlet tubes 24 being. connectedr to a common main. inlet S8 by means of the main channel 57. Each of the pumps d in Fig. 6 is poweredby,Y a common drive, as. shown, so that all of the, pumps d are op eratedsimultaneously. However, the-pumps, d in'Fig. 6 are notoperated in, phase. withone another so that one ofthe` pumpsd is: always crea-ting a vacuum in the-zone 3 so that the ascension of the column of liquid being drawnY upwardly. in the. common. main inlet 58,` isnot interrupted.

' Function Whem stem 1.0 raises the disk 11, it closes-the opening 12 draggingA in its' ascending movement the cylindrical tube 6 which, operating as a. piston-produces avacu'um in thelower zone 33 ofthe body of pump'a, whilstsimultaneously, by pressing part 53 of the cam'd 47 against the roller 49 (Fig. 4) commences toelevate stem 31 With the admission valve c asmay be seen in Fig.- 6 (third bodyof the pump). Whenpoint'54 of earn` 47-isreached, cam 47 is able to maintain roller 49`-in alifted position overcomingthe tension of springh 34 along thel original circumferential segment 54- and extreme 55, so that plunger` 27 ismaintained in such a position that the disk 25l opensthe entrance 2`4fforv the` liquid; Owingto said existing depression in the inferior part" of pumpl athe liquid suctione'dl by mouth 24iills" saidl inferipr'- zone as maybe-seen inFigs. land 2-l ('rst body` of pump Fig. 6'). When stem 10 reaches the maximum limit ofi its run in an ascending movement, the descending movement is initiated-(second body of'pump Fig.- 6) and stemfv'- forces downward disk? 1l', uncoveringthe opening 12, as cylinder 6 is retained by the friction of rings 7 with their respective jackets 4 and 5. Simultaneously roller 49 has found a reduced space through the periphery 55-56 where cam 47 does not keep said roller 49 in its position 51 (Fig. 5), so that spring 34 carries it gradually to position 52 in accordance with said periphery; in this manner it allows stem 31 to descend, with which also causes descent of disk 25, on the entrance of liquid 24. On the other hand plunger b pursues' its downward run whilst cam 47 in its rotation has freed roller 49, this position being maintained by the spring 34. (Figs. 3 and 2 of the pump body Fig. 6.)

Owing to the fact that the entrance 24 remains closed and the opening'. 12 is uncovered during the descending run of stem 10 and disk 11, the cylindrical tube 6 is carried by the spider 20, the liquid passing to the interior of cylinder 6.

When again the ascendingv movement of stern 10 is initiated, closing the opening 12,` the liquid contained in the cylindrical tube 6 tlows through the lateral opening 14.

The positions of cam 47 in Figs. 2, 3 and 4 corresponding to thelst, 2nd and 3rd bodies of the pump in Fig. 6, respectively, are taken a't the same moment, that is, when the first pump has reached its superior dead point, and the third. pump has commenced its continuous suction operation.

Owing to: the perfect manner in which are adjusted thc tubular joints on the corresponding solidary rings to the mobile parts of the pumps, in order to effect the suction operation of the parts destined for hermetically sealing the openings' communicating with the exterior, the pump of the present invention is able to render a high yield.

It is obvious that in carrying out the present invention, modifications of detail and structure of the specified de vice may be introduced, without this implying a departure from the scope of said invention, the characteristics of which are clearly stated in the following claims.

Weclaim:

1. A suction pump comprising a cylindrical pump body, a cylindrical tube positioned concentrically within said body for vertical reciprocation therein, rings mounted at the upper and lower exterior of said tube for frictional engagement with the interior of said body, a stem, a disk secured to the lower end of said stem and capable on closing the lower end. of said tube, a' spider mounted onl said stem above. said tube, said disk being spaced from said' spider a distance greater than the. length of said tubje so thatv when said spider bears against the upper end of said tube, said disk is spaced from the lower end; of said tube, an inlet for liquid positioned beneath said pump body, an outlet for liquid positioned aboveV said4 pump body, valve means for said inlet for liquid? andmechanical means for opening and closing saidvalve` means in. timed relationl to the vertical reciprocation of said'` tube.

2. AV suction pump as recited in claimy 1 in which said valve means comprises a disk overlyingl said' inlet and saidz mechanical means for opening and closing' said valve means comprisesA a reciprocating plunger.

3 A suction pump as recited in claim 2 in which said reciprocating plunger is cam actuated and spring biased in a downward inlet closing direction.

4. A4 suction pump as recited in claim 3 in which said stem andsaid cam are actuated by a common drive.

5. AV suction pump as recited in claim 4 in which said stern is` secured at its upper end to a gear at a point spacedfrom. the` center of said gear,y said gear being securedto an axle; which passes through an opening in the upper? end of said reciprocating plunger, a cam carried by. saidaxle adjacent.- the upper end of said plunger, arollermounted for.l free' rotation on said plunger above sa'idl' opening, said roller overlying the periphery of said cam.

6. A suction pump'as'recited in claim 1 in which said cylindrical pump body comprises a central zone having a diameter greater than the diameter of said tube and upper and lower zones having a diameter greater than the diameter of said central zone.

7. A suction pump as recited in claim 6 in which said upper and lower zones are internally lined with elastic tubular jackets and said rings bear against said jackets.

8. A suction pump as recited in claim 1 in which a plurality of suction pumps are employed, each of said pumps having itsl inlet connected to an upwardly extending common inlet for liquid and said tubes are simultaneously reciprocated so that at least one of said tubes is being drawn upwardly at all times to prevent 6 interruption of the upward ow of liquid in said cornmon inlet.

9. A suction pump as recited in claim 8 in which said plurality of suction pumps are operated with a common 5 drive.

References Cited in the file of this patent UNITED STATES PATENTS 1 84,846 Snell Dec. 8, 1868 0 693,920 sterren Feb. 25, 1902 1,353,391 Hall -..u Sept. 21, 1920 2,231,666 Golber a Feb. 11, 1941 

